Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory

Size: px
Start display at page:

Download "Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory"

Transcription

1 Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory Title High pt inclusive charged hadron spectra from Au+Au collisions at Sqrt(s_NN)=00 Gev Permalink Authors Klay, Jennifer L. STAR Collaboration Publication Date escholarship.org Powered by the California Digital Library University of California

2 p s NN High Inclusive Charged Hadron Spectra from Au+Au Collisions at = 00 GeV Jennifer L. Klay a for the STAR Collaboration Λ a Lawrence Berkeley National Laboratory, One Cyclotron Road, MS-70R039, Berkeley, California, U.S.A. The STAR Collaboration presents new measurements of inclusive charged hadron distributions for < GeV/c from Au+Au collisions at p s NN = 00 GeV. Charged hadron suppression at high is similar in shape and magnitude at all centralities to that observed previously at p s NN = 30 GeV for < 6 GeV/c. The ratio of spectra from central and peripheral Au+Au collisions shows that hadron suppression is approximately constant within 6 < < GeV/c. The ratios of charged hadron spectra at the two beam energies show a 5-0% increase in yield at low. At high, the ratios show a larger increase that agrees well with pqcd calculations of the p s NN dependence of particle production in Au+Au collisions.. Introduction The suppression of high hadron production at p s NN = 30 GeV observed by both the PHENIX and STAR collaborations provided the first experimental signatures potentially related to partonic energy loss in the dense nuclear medium produced in RHIC collisions[, ]. Theoretical calculations of the dependence of the nuclear modification factor, R AA, suggest that an interplay of nuclear gluon shadowing, Cronin enhancement and partonic energy loss in a dense medium will cause the suppression to saturate at a finite value[3]. Above a certain threshold, R AA may increase slowly with toward the binary scaling limit predicted by perturbative QCD[4]. The new STAR data on charged hadron spectra in Au+Au collisions at p s NN = 00 GeV, which extend to = GeV/c, address these predictions and present an important constraint on theoretical descriptions of high phenomena in nuclear collisions.. Data Collection and Analysis The data at p s NN = 00 GeV were taken during the second RHIC run in 00 using the STAR detector. The minimum bias dataset, corrected for vertex finding efficiency, contains 97 ± 3% of the total geometric cross-section for Au+Au collisions, assumed to be 7. barns. For this analysis,.7m minimum bias and.m central triggered Au+Au events were used. Event centrality classes corresponding to percentiles of the total crosssection were determined using the charged particle multiplicity within j j <. Λ For the full author list and acknowledgments, see Appendix Collaborations" of this volume.

3 Charged particles are detected in the TPC and their momentum is measured through their curvature in the Tesla magnetic field. The high analysis is restricted to long tracks ( 0 measured track points) with j j < whose projected distance of closest approach to the primary event vertex falls within cm of the measured vertex. Tracking performance at high was as- 0 3 sessed by embedding simulated tracks into 0 STAR Preliminary real data events. For the 0-5% most central events, the efficiency and acceptance 0 Au+Au, s NN = 00 GeV + - ( h +h )/ for tracks having p 0 - T > 3GeV/cand j j < are uniform as a function of p 0 - T at approximately 80%, with a small dependence 0-3 on pseudorapidity of ± 3%. For the % most peripheral events, the efficiency % 0 is higher due to lower track density, and % / % /0 is 90% above = 3 GeV/c and independent of and. Momentum resolution in 0-30% / % / % /5 the 00 GeV dataset is a factor of 3 better 60-80% / than that in the 30 GeV dataset[] The dominant backgrounds in the high p Figure : Charged hadron spectra from T spectra are from weak decays of Λ and Au+Au collisions at p Ks s NN = 00 GeV. 0 particles and apparent high tracks from p and n annihilation in detector material. Background corrections are estimated using HIJING events in a GEANT simulation of the detector, with the parent Λ, Ks 0 and p distributions from HIJING scaled to match STAR measured yields and slopes at p s NN = 30 GeV, corrected for the p s NN dependence of particle production. The backgrounds are estimated to be less than 0% for > 3 GeV/c. However, due to the uncertainty in the yields of Λs and Ks 0 s at high, the background corrections above = 3 GeV/c are assigned 00% uncertainty. The systematic uncertainties assigned to the spectra are determined by combining the uncertainties from the momentum resolution correction, the background subtraction and variations in the spectra for different sets of quality cutsand corrections. ) - ( = 0 dη η N/d ) d /(π 3. Results The charged hadron spectra for < GeV/c are shown in Fig., with the noncentral bins scaled for clarity. The limits of the bins in are indicated at the top of the figure by the hash marks, with the highest bin having the range 0 < < GeV/c. To explore the pattern of hadron suppression to the highest, Fig. compares the binary-collision scaled STAR central 0-5% spectrum to the 40-60% (top panel) and the 60-80% (lower panel) spectra. The preliminary 00 GeV data are shown as black circles, while the STAR results at p s NN = 30 GeV[] are shown as open diamonds. The vertical error bars represent statistical and systematic uncertainties in the central 0-5% spectra, while the caps show the quadrature sum of these uncertainties with the uncertainties associated with the peripheral reference spectrum. The dashed lines indicate the mean number of binary collisions, hn binary i, and the mean number of participant nucleons,

4 3 hn part i, obtained from a Monte Carlo Glauber model of the nuclear overlap, with their uncertainties shown as the gray boxes. The suppression pattern is similar at the two beam energies, showing an increasing suppression as a function of for = - 6 GeV/c. The 00 GeV data, which extend to = GeV/c, show that the suppression for central collisions saturates and is approximately constant above = 6 GeV/c. The nuclear modification factor R AA = Binary scaling dn=dpt d (AA) TAAdff=dpT, where T AA is the nuclear d (NN) overlap integral, depends on the knowledge ofthe nucleon-nucleon (NN) reference Participant scaling spectrum. A power law parameterization 0-5%/40-60% STAR Preliminary (dff=d d = A( + =p 0 ) n ) of the UA measured charged particle spectrum from p + p collisions at p s NN = 00 GeV[5] is / (dn/d /<N bin >) periph (dn/d /<N bin >) cent 0-0-5%/60-80% Figure : Central/peripheral ratio: upper panel is 0-5%/40-60%, lower panel is 0-5%/60-80%. used to construct R AA. The parameterization was corrected for the larger UA j j acceptance (j j <.5) as in[]. Since power law fits cannot be meaningfully extrapolated beyond the range constrained by data, we restrict R AA analysis to < 6 GeV/c. Fig. 3 shows the centrality dependence of R AA at p s NN = 00 GeV. The error bars are similar to those in Fig.. Plotting this ratio on a log scale separates the evolution of the shape of the measured suppression from the uncertainties in the geometric scaling and the reference spectrum. The shape of the suppression is seen to evolve smoothly as a function of centrality, with no evidence of a threshold for the onset of suppression[7]. The magnitude and evolution of R AA at p s NN = 00 GeV is consistent with that observed in p snn = 30 GeV Au+Au collisions []. The p s NN dependence of charged particle production at midrapidity is shown in Fig. 4. The error bars represent the combination of statistical uncertainties in the numerator and the total uncertainty (statistical + systematic) in the denominator. There is an approximately 5-0% increase in the particle yield at low in the 00 GeV data compared to the 30 GeV data[8,9]. The curves (the same in all panels) are pqcd calculations for p+p collisions (solid line) and central Au+Au collisions with (dotted line) and without (dashed line) quenching[0]. The high behaviour is consistent with the pqcd expectation. The combination of these results with the p s NN dependence of the high charged hadron azimuthal anisotropy[] and the high two-particle correlations[] observed by STAR, suggests a picture of strong absorption in the bulk and surface emission of hard scattering products. 4. Conclusions STAR has measured charged particle production within 0. < < GeV/c as a function of centrality in Au+Au collisions at p s NN = 00 GeV. The suppression observed at p s NN = 00 GeV is similar to that observed at 30 GeV. With the extension of the

5 4 dn/d dη (STAR) R AA dσ/d dη (NN) T AA = 0-5% Binary scaling 5-0% Participant scaling 0-0% 30-40% 40-60% % STAR Preliminary dn/d dη (00 GeV) dn/d dη (30 GeV).5 0-5%.5.5 p+p Au+Au Central, de/dx > 0 Au+Au Central, de/dx = 0 5-0%.5 0-0% 30-40% % % STAR Preliminary Figure 3. The nuclear modification factor, R AA, as a function of for six centrality classes. The NN reference spectrum is the same in all panels. Figure 4. Ratios of charged hadron spectra from Au+Au collisions at p s NN = 00 and 30 GeV. The curves (same in all panels) are pqcd calculations described in the text. spectra to much higher, the binary-scaled central/peripheral ratios show that the charged hadron suppression is approximately constant above = 6 GeV/c. The ratios of the spectra at p s NN = 00 GeV to those at 30 GeV show that high particle production grows with p s NN for all centralities in Au+Au collisions similarly to pqcd expectations. In order to disentangle the interplay between nuclear gluon shadowing, Cronin enhancement and possible partonic energy loss in a high density quark gluon plasma, which may all contribute to the observed suppression pattern, d+a collisions at RHIC are eagerly anticipated. REFERENCES. K. Adcox, et al., PHENIX Collaboration, Phys. Rev. Lett. 88, 030 (00).. C. Adler, et al., STAR Collaboration, nucl-ex/0060, to appear in Phys. Rev. Lett. 3. I. Vitev and M. Gyulassy, Phys. Rev. C65, 0490 (00). 4. E. Wang and X.N. Wang, hep-ph/ C. Albajar, et al., Nucl. Phys. B335, 6 (990). 6. K. Adcox, et al., PHENIX Collaboration, nucl-ex/ X.N. Wang, Phys. Rev. C63, (00). 8. B.B. Back, et al., PHOBOS Collaboration, Phys. Rev. C65, 0690(R) (00). 9. G. Van Buren for the STAR Collaboration, these proceedings. 0. X.N. Wang, Phys. Rev. C6, (000).. K.V. Filimonov for the STAR Collaboration, these proceedings.. D.H. Hardtke for the STAR Collaboration, these proceedings.

High-p T Neutral Pion Production in Heavy Ion Collisions at SPS and RHIC

High-p T Neutral Pion Production in Heavy Ion Collisions at SPS and RHIC High- Neutral Pion Production in Heavy Ion Collisions at SPS and RHIC K. Reygers for the WA98 and the PHENIX collaboration Institut für Kernphysik der Universität Münster Wilhelm-Klemm-Str. 9, D-4849 Münster,

More information

Recent Results from RHIC: On the trail of the Quark-Gluon Plasma

Recent Results from RHIC: On the trail of the Quark-Gluon Plasma Recent Results from RHIC: On the trail of the Quark-Gluon Plasma Single Au+Au Collision seen by STAR@RHIC Gunther Roland Gunther Roland/MIT July 15 2003 MPI Munich 15/7/2003 Gunther Roland/MIT www.spiegel.de

More information

arxiv: v1 [nucl-ex] 12 May 2008

arxiv: v1 [nucl-ex] 12 May 2008 1 Highlights from PHENIX - II arxiv:0805.1636v1 [nucl-ex] 12 May 2008 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Terry C. Awes (for the PHENIX Collaboration ) Oak

More information

Pion, Kaon, and (Anti-) Proton Production in Au+Au Collisions at s = 62.4 GeV

Pion, Kaon, and (Anti-) Proton Production in Au+Au Collisions at s = 62.4 GeV Pion, Kaon, and (Anti-) Proton Production in AuAu Collisions at s = 6.4 GeV NN Ming Shao 1, for the STAR Collaboration 1 University of Science & Technology of China, Anhui 3007, China Brookhaven National

More information

The measurement of non-photonic electrons in STAR

The measurement of non-photonic electrons in STAR The measurement of non-photonic electrons in STAR Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Břehová 7, 11519, Prague 1, Czech Republic E-mail: olga.hajkova@fjfi.cvut.cz

More information

arxiv: v1 [nucl-ex] 11 Jul 2011

arxiv: v1 [nucl-ex] 11 Jul 2011 Bulk Properties of Pb-Pb collisions at snn = 2.76 TeV measured by ALICE arxiv:17.1973v1 [nucl-ex] 11 Jul 2011 Alberica Toia for the ALICE Collaboration CERN Div. PH, 1211 Geneva 23 E-mail: alberica.toia@cern.ch

More information

Small Collision Systems at RHIC

Small Collision Systems at RHIC EPJ Web of Conferences 7, (8) SQM 7 https://doi.org/.5/epjconf/87 Small Collision Systems at RHIC Norbert Novitzky, Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 79, USA

More information

1992 Predictions for RHIC with HIJING

1992 Predictions for RHIC with HIJING 1992 Predictions for RHIC with HIJING HIJING: A MONTE CARLO MODEL FOR MULTIPLE JET PRODUCTION IN P P, P A AND A A COLLISIONS Phys.Rev.D44:3501-3516,1991 GLUON SHADOWING AND JET QUENCHING IN A + A COLLISIONS

More information

Sub-hadronic degrees of freedom in ultrarelativistic nuclear collisions at RHIC and beyond

Sub-hadronic degrees of freedom in ultrarelativistic nuclear collisions at RHIC and beyond Sub-hadronic degrees of freedom in ultrarelativistic nuclear collisions at RHIC and beyond Lawrence Berkeley National Laboratory Berkeley, US 1 Introduction: Heavy Ion Physics Today t = 5 10 17 sec T=1

More information

arxiv:nucl-ex/ v1 10 May 2004

arxiv:nucl-ex/ v1 10 May 2004 arxiv:nucl-ex/0405004v1 10 May 2004 Proc. 20th Winter Workshop on Nuclear Dynamics (2003) 000 000 Anisotropic flow at RHIC A. H. Tang 1 for the STAR Collaboration 1 NIKHEF and Brookhaven National Lab,

More information

Strange Hadron Production from STAR Fixed-Target Program

Strange Hadron Production from STAR Fixed-Target Program Strange Hadron Production from STAR Fixed-Target Program (for the STAR Collaboration) Department of Engineering Physics, Tsinghua University, Beijing 84, China E-mail: musman_mughal@yahoo.com We report

More information

Azimuthal anisotropy of the identified charged hadrons in Au+Au collisions at S NN. = GeV at RHIC

Azimuthal anisotropy of the identified charged hadrons in Au+Au collisions at S NN. = GeV at RHIC Journal of Physics: Conference Series PAPER OPEN ACCESS Azimuthal anisotropy of the identified charged hadrons in Au+Au collisions at S NN = 39-200 GeV at RHIC To cite this article: S S Vdovkina 2017 J.

More information

Proton-lead measurements using the ATLAS detector

Proton-lead measurements using the ATLAS detector Proton-lead measurements using the ATLAS detector Martin Spousta for the ATLAS Collaboration Charles University in Prague DOI: http://dx.doi.org/10.3204/desy-proc-2014-04/275 Measurements of soft and hard

More information

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland CMS CR /8 he Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH- GENEVA 3, Switzerland 3/7/ Nuclear modification factors from the CMS experiment arxiv:7.3v [hep-ex] 3 Jul

More information

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland CMS CR - he Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH- GENEVA 3, Switzerland 8/5/6 Charmonium production measured in and pp collisions by CMS arxiv:7.5v [nucl-ex]

More information

arxiv:nucl-ex/ v1 21 Dec 2004

arxiv:nucl-ex/ v1 21 Dec 2004 φ meson production in d + Au collisions at s NN = 00 GeV arxiv:nucl-ex/041048v1 1 Dec 004 1. Introduction Dipali Pal for the PHENIX collaboration Department of Physics & Astronomy, Vanderbilt University,

More information

Charged particle production in Pb-Pb and p-pb collisions at ALICE

Charged particle production in Pb-Pb and p-pb collisions at ALICE Journal of Physics: Conference Series OPEN ACCESS Charged particle production in Pb-Pb and p-pb collisions at To cite this article: Chiara Oppedisano and the Collaboration J. Phys.: Conf. Ser. View the

More information

Pion and photon production in heavy ion collisions

Pion and photon production in heavy ion collisions BNL, USA E-mail: david@bnl.gov Measurement of neutral pions and direct photons are closely connected experimentally, on the other hand they probe quite different aspects of relativistic heavy ion collisions.

More information

snn = 200 GeV Au+Au collisions with the STAR experiment

snn = 200 GeV Au+Au collisions with the STAR experiment Measurements of open charm production and flow in snn = GeV Au+Au collisions with the STAR experiment at RHIC Spyridon Margetis 1, for the STAR Collaboration 1 Department of Physics, Kent State University,

More information

Summary on high p T probes

Summary on high p T probes Eur. Phys. J. C (2009) 61: 741 745 DOI 10.1140/epjc/s10052-009-0913-6 Regular Article - Experimental Physics Summary on high p T probes Saskia Mioduszewski a Cyclotron Institute, Texas A&M University,

More information

Soft physics results from the PHENIX experiment

Soft physics results from the PHENIX experiment Prog. Theor. Exp. Phys. 2015, 03A104 (15 pages) DOI: 10.1093/ptep/ptu069 PHYSICS at PHENIX, 15 years of discoveries Soft physics results from the PHENIX experiment ShinIchi Esumi, Institute of Physics,

More information

arxiv: v1 [nucl-ex] 14 Oct 2013

arxiv: v1 [nucl-ex] 14 Oct 2013 Charged Jets in Minimum Bias p-pb Collisions at snn = 5.02 TeV with ALICE arxiv:1310.3612v1 [nucl-ex] 14 Oct 2013 for the ALICE collaboration Westfälische Wilhelms-Universität Münster, Germany E-mail:

More information

Charged Particle Production in Pb+Pb Collisions at snn=2.76 TeV with the ATLAS detector at the LHC

Charged Particle Production in Pb+Pb Collisions at snn=2.76 TeV with the ATLAS detector at the LHC Charged Particle Production in Pb+Pb Collisions at snn=2.76 TeV with the ATLAS detector at the LHC Dominik Derendarz for the ATLAS Collaboration Institute of Nuclear Physics PAN, Kraków, Poland Introduction

More information

Photon and neutral meson production in pp and PbPb collisions at ALICE

Photon and neutral meson production in pp and PbPb collisions at ALICE Photon and neutral meson production in pp and PbPb collisions at ALICE Dieter Roehrich University of Bergen, Norway for the ALICE Collaboration Nuclear collisions at the LHC Photons as a probe for the

More information

Charm production at RHIC

Charm production at RHIC 1 Charm production at RHIC Charm 2007 Conference Cornell University, Ithaca, NY 5 August 2007 2 The Quark Gluon Plasma T c Early universe quark-gluon plasma LHC RHIC Tri-critical point? Quark deconfinement

More information

Results with Hard Probes High p T Particle & Jet Suppression from RHIC to LHC

Results with Hard Probes High p T Particle & Jet Suppression from RHIC to LHC Results with Hard Probes High p T Particle & Jet Suppression from RHIC to LHC PHENIX! AGS! RHIC! STAR! Cover 3 decades of energy in center-of-mass s NN = 2.76 TeV 5.5 TeV (2015) CMS LHC! s NN = 5-200 GeV

More information

arxiv:nucl-th/ v1 31 Dec 2002

arxiv:nucl-th/ v1 31 Dec 2002 arxiv:nucl-th/0212111v1 31 Dec 2002 HIGH-P T PION PRODUCTION IN HEAVY-ION COLLISIONS AT RHIC ENERGIES G. G. BARNAFÖLDI, P. LÉVAI KFKI Research Institute for Particle and Nuclear Physics, P.O. Box 49, Budapest,

More information

Jet quenching in PbPb collisions in CMS

Jet quenching in PbPb collisions in CMS Jet quenching in PbPb collisions in CMS Bolek Wyslouch École Polytechnique Massachusetts Institute of Technology arxiv:1102.1957 Orsay, February 18, 2011 1 Heavy Ions at the LHC Huge energy jump from RHIC:

More information

Heavy quark results from STAR

Heavy quark results from STAR Eur. Phys. J. C (2009) 61: 659 664 DOI 10.1140/epjc/s10052-009-0931-4 Regular Article - Experimental Physics Heavy quark results from STAR Xin Dong a for the STAR Collaboration Lawrence Berkeley National

More information

arxiv: v1 [hep-ex] 18 May 2015

arxiv: v1 [hep-ex] 18 May 2015 ALICE summary of light flavour results at intermediate and high p arxiv:55.477v [hep-ex] 8 May 5 uva Richert, on behalf of the ALICE collaboration Lund University, Department of Physics, Div. of Particle

More information

Can hadronic rescattering explain the jet quenching at relativistic energies?

Can hadronic rescattering explain the jet quenching at relativistic energies? PHYSICAL REVIEW C 71, 3496 (25) Can hadronic rescattering explain the jet quenching at relativistic energies? David Hardtke Department of Physics, University of California, Berkeley, California 9472 USA

More information

Measurement of light mesons at RHIC by the PHENIX experiment

Measurement of light mesons at RHIC by the PHENIX experiment Eur. Phys. J. C (2009) 61: 835 840 DOI 10.1140/epjc/s10052-009-0879-4 Regular Article - Experimental Physics Measurement of light mesons at RHIC by the PHENIX experiment M. Naglis a for the PHENIX Collaboration

More information

Low Momentum Direct Photons in Au+Au collisions at 39 GeV and 62.4 GeV measured by the PHENIX Experiment at RHIC

Low Momentum Direct Photons in Au+Au collisions at 39 GeV and 62.4 GeV measured by the PHENIX Experiment at RHIC Low Momentum Direct Photons in Au+Au collisions at 39 GeV and 6.4 GeV measured by the PHENIX Experiment at RHIC Vladimir Khachatryan for the PHENIX Collaboration Department of Physics and Astronomy, Stony

More information

arxiv: v1 [nucl-ex] 10 Jan 2009

arxiv: v1 [nucl-ex] 10 Jan 2009 Hard Probes 2008 Conference Proceedings. June 9th, 2008. Illa da Toxa, Spain Two-particle Direct Photon-Jet Correlation Measurements in PHENIX J. Frantz a for the PHENIX Collaboration a State University

More information

Longitudinal Double Spin Asymmetry in Inclusive Jet Production at STAR

Longitudinal Double Spin Asymmetry in Inclusive Jet Production at STAR Longitudinal Double Spin Asymmetry in Inclusive Jet Production at STAR Katarzyna Kowalik for the STAR Collaboration Lawrence Berkeley National Laboratory, Berkeley, California 94720 Abstract. This contribution

More information

Shingo Sakai Univ. of California, Los Angeles

Shingo Sakai Univ. of California, Los Angeles Shingo Sakai Univ. of California, Los Angeles Non-photonic e result in AuAu b/c separation in non-photonic electron by electron-hadron correlations @ pp Bottom production Discuss heavy flavor energy loss

More information

arxiv:nucl-ex/ v2 1 Mar 2007

arxiv:nucl-ex/ v2 1 Mar 2007 March, 007 :57 WSPC/INSRUCION FILE International Journal of Modern Physics E c World Scientific Publishing Company arxiv:nucl-ex/070057v Mar 007 SIMULAION OF JE QUENCHING OBSERVABLES IN HEAVY ION COLLISIONS

More information

Heavy-flavor production in pp and Pb Pb collisions at LHC with ALICE

Heavy-flavor production in pp and Pb Pb collisions at LHC with ALICE Heavy-flavor production in pp and Pb Pb collisions at LHC with ALICE Kai Schweda 1 on behalf of the ALICE Collaboration Physikalisches Institut der Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg,

More information

Partonic transport simulations of jet quenching

Partonic transport simulations of jet quenching Partonic transport simulations of jet quenching Z. Xu, C. Greiner Institut für Theoretische Physik J. W. Goethe-Universität, Frankfurt Outline motivation introduction to the model simulations of Au+Au

More information

Angular correlations of identified particles in the STAR BES data

Angular correlations of identified particles in the STAR BES data Angular correlations of identified particles in the STAR BES data, for the STAR Collaboration Warsaw University of Technology E-mail: andrew.lipiec@gmail.com The angular correlation function (CF) in this

More information

Correlations of Electrons from Heavy Flavor Decay with Hadrons in Au+Au and p+p Collisions arxiv: v1 [nucl-ex] 11 Jul 2011

Correlations of Electrons from Heavy Flavor Decay with Hadrons in Au+Au and p+p Collisions arxiv: v1 [nucl-ex] 11 Jul 2011 Correlations of Electrons from Heavy Flavor Decay with Hadrons in and Collisions arxiv:7.v [nucl-ex] Jul Anne M. Sickles, for the PHENIX Collaboration Brookhaven National Laboratory, Upton, NY E-mail:

More information

PoS(DIS2017)208. Nuclear PDF studies with proton-lead measurements with the ALICE detector

PoS(DIS2017)208. Nuclear PDF studies with proton-lead measurements with the ALICE detector Nuclear PDF studies with proton-lead measurements with the ALICE detector a,b for the ALICE Collaboration a Institute for Subatomic Physics, Department for Physics and Astronomy and EMMEφ, Faculty of Science,

More information

Event anisotropy at RHIC

Event anisotropy at RHIC Event anisotropy at RHIC Nu Xu - LBNL 1) Introduction 2) Experimental details and 200 GeV results v 2 (m 0, p T, y, b, A) 3) Summary and outlook PHENIX: N. Ajitanand, S. Esumi, R. Lacey, J. Rak PHOBOS:

More information

Glauber modelling in high-energy nuclear collisions. Jeremy Wilkinson

Glauber modelling in high-energy nuclear collisions. Jeremy Wilkinson Glauber modelling in high-energy nuclear collisions Jeremy Wilkinson 16/05/2014 1 Introduction: Centrality in Pb-Pb collisions Proton-proton collisions: large multiplicities of charged particles produced

More information

Helena Santos, for the ATLAS Collaboration LIP - Laboratório de Instrumentação e Física Experimental de Partículas

Helena Santos, for the ATLAS Collaboration LIP - Laboratório de Instrumentação e Física Experimental de Partículas , for the ALAS Collaboration LIP - Laboratório de Instrumentação e Física Experimental de Partículas E-mail: helena@lip.pt A wide research program provided by heavy ion collisions is ongoing at the Large

More information

Measurements of dilepton continuum at the PHENIX experiment at RHIC. s NN =200 GeV Au+Au and p+p collisions.

Measurements of dilepton continuum at the PHENIX experiment at RHIC. s NN =200 GeV Au+Au and p+p collisions. Measurements of dilepton continuum at the PHENIX experiment at RHIC SUNY, Stony Brook E-mail: alberica@skipper.physics.sunysb.edu PHENIX has measured the dielectron continuum in s NN = GeV Au+Au and p+p

More information

arxiv: v1 [nucl-ex] 10 Feb 2012

arxiv: v1 [nucl-ex] 10 Feb 2012 Cent. Eur. J. Phys. 1-5 Author version Central European Journal of Physics Highlights of the Beam Energy Scan from STAR Review Article arxiv:10.389v1 [nucl-ex] 10 Feb 01 A. Schmah for the STAR Collaboration

More information

Di muons and the detection of J/psi, Upsilon and Z 0 Jets and the phenomenon of jet quenching

Di muons and the detection of J/psi, Upsilon and Z 0 Jets and the phenomenon of jet quenching collisions in CMS Bolek Wyslouch École Polytechnique Massachusetts Institute of Technology on behalf of CMS Collaboration CERN, December 2, 2010 1 Heavy Ions at the LHC Huge energy jump from RHIC: factor

More information

arxiv: v1 [hep-ex] 18 Jan 2016

arxiv: v1 [hep-ex] 18 Jan 2016 Jet measurements in pp, p Pb and Pb Pb collisions with ALICE at the LHC arxiv:6.446v [hep-ex] 8 Jan 6 Centre for Astroparticle Physics and Space Science, Bose Institute, Kolkata, 79 (INDIA) E-mail: sprasad@cern.ch

More information

+ High p T with ATLAS and CMS in Heavy-Ion 2.76TeV

+ High p T with ATLAS and CMS in Heavy-Ion 2.76TeV + High p T with ATLAS and CMS in Heavy-Ion Collisions @ 2.76TeV Lamia Benhabib On behalf of ATLAS and CMS HCP 2011, Paris lamia.benhabib@llr.in2p3.fr +Outlook Introduction : hard probes Strongly interacting

More information

arxiv: v1 [nucl-ex] 29 Feb 2012

arxiv: v1 [nucl-ex] 29 Feb 2012 Measurement of the nuclear modification factor of electrons from heavy-flavour hadron decays in Pb Pb collisions at s NN =.76 ev with ALICE at the LHC arxiv:.65v [nucl-ex] 9 Feb Markus Fasel for the ALICE

More information

Inclusive spectrum of charged jets in central Au+Au collisions at s NN = 200 GeV by STAR

Inclusive spectrum of charged jets in central Au+Au collisions at s NN = 200 GeV by STAR Inclusive spectrum of charged jets in central Au+Au collisions at s NN = 200 GeV by SAR Nuclear Physics Institute, Academy of Sciencis of Czech Republic, Na ruhlarce 39/64, 180 86 Prague, Czech Republic

More information

Charged jets in p Pb collisions measured with the ALICE detector

Charged jets in p Pb collisions measured with the ALICE detector Charged jets in p Pb collisions measured with the ALICE detector (CERN) for the ALICE collaboration (25.03.2015) Rencontres de Moriond, QCD and High Energy Interactions, La Thuile Motivation for p Pb Study

More information

PHENIX measurements of bottom and charm quark production

PHENIX measurements of bottom and charm quark production Journal of Physics: Conference Series PAPER OPEN ACCESS PHENIX measurements of bottom and charm quark production To cite this article: Timothy Rinn and PHENIX Collaboration 2018 J. Phys.: Conf. Ser. 1070

More information

The Quark-Gluon Plasma and the ALICE Experiment

The Quark-Gluon Plasma and the ALICE Experiment The Quark-Gluon Plasma and the ALICE Experiment David Evans The University of Birmingham IoP Nuclear Physics Conference 7 th April 2009 David Evans IoP Nuclear Physics Conference 2009 1 Outline of Talk

More information

Particle Production, Correlations and Jet Quenching at RHIC

Particle Production, Correlations and Jet Quenching at RHIC QCD@Work 23 International Workshop on QCD, Conversano, Italy, 4 8 June 23 Particle Production, Correlations and Jet Quenching at RHIC John W. Harris Physics Department, Yale University, P.O. Box 2824,

More information

Azimuthal distributions of high-pt direct and 0. at STAR

Azimuthal distributions of high-pt direct and 0. at STAR Azimuthal distributions of high-pt direct and 0 w.r.t reaction plane For the at STAR Ahmed Hamed Collaboration Hot Quarks 2010 La Londe les Maures, 21-26th June, 2010 Ahmed Hamed (Texas A&M University)

More information

In-Medium Energy Loss and Correlations in Pb-Pb Collisions at 2.76 TeV with ALICE

In-Medium Energy Loss and Correlations in Pb-Pb Collisions at 2.76 TeV with ALICE In-Medium Energy Loss and Correlations in Pb-Pb Collisions at 2.76 TeV with ALICE Jan Fiete Grosse-Oetringhaus CERN/PH for the ALICE Collaboration Heavy Ions: Experiments Confront Theory Copenhagen, 8th

More information

arxiv:nucl-ex/ v2 18 Jun 2003

arxiv:nucl-ex/ v2 18 Jun 2003 Ξ and Ξ + production in Pb+Pb collisions at 4 A GeV at CERN SPS arxiv:nucl-ex/352v2 8 Jun 23. Introduction Christine Meurer for the NA49 Collaboration E-mail: Christine.Meurer@cern.ch Gesellschaft für

More information

arxiv: v1 [hep-ex] 10 Jan 2019

arxiv: v1 [hep-ex] 10 Jan 2019 Proceedings Event activity measurements and mid-rapidity correlations in GeV p+au collisions at SAR David Stewart for the SAR Collaboration Yale University; david.j.stewart@yale.edu Presented at Hot Quarks

More information

arxiv: v1 [nucl-ex] 6 Dec 2011

arxiv: v1 [nucl-ex] 6 Dec 2011 Higher harmonic anisotropic flow measurements of charged particles at s NN =.76 TeV with the ALICE detector You Zhou (for the ALICE Collaboration) arxiv:111.156v1 [nucl-ex] 6 Dec 011 Nikhef, Science Park

More information

Perspectives for the measurement of beauty production via semileptonic decays in ALICE

Perspectives for the measurement of beauty production via semileptonic decays in ALICE Perspectives for the measurement of beauty production via semileptonic decays in ALICE Rosario Turrisi INFN Padova (Italy for the ALICE collaboration Contents Motivation: energy loss ALICE detector highlights

More information

Jet Physics with ALICE

Jet Physics with ALICE Jet Physics with ALICE Oliver Busch for the ALICE collaboration Oliver Busch Tsukuba 2014 /03/13 1 Outline introduction results from pp jets in heavy-ion collisions results from Pb-Pb collisions jets in

More information

Review of photon physics results at Quark Matter 2012

Review of photon physics results at Quark Matter 2012 Review of photon physics results at Quark Matter 2012 Jet Gustavo Conesa Balbastre 1/28 Why photons? Direct thermal: Produced by the QGP Measure medium temperature R AA > 1, v 2 > 0 Direct prompt: QCD

More information

Heavy Ion Results from the ALICE Experiment

Heavy Ion Results from the ALICE Experiment Heavy Ion Results from the ALICE Experiment Johannes P. Wessels on behalf of the ALICE Collaboration Institute for uclear Physics University of Münster D-89 Münster, Germany and CER, CH- Geneva, Switzerland

More information

MULTI-CHANNEL MEASUREMENTS OF LIGHT VECTOR MESONS AT PHENIX

MULTI-CHANNEL MEASUREMENTS OF LIGHT VECTOR MESONS AT PHENIX International Journal of Modern Physics E Vol. 16, Nos. 7 & 8 (2007) 2154 2159 c World Scientific Publishing Company MULTI-CHANNEL MEASUREMENTS OF LIGHT VECTOR MESONS AT PHENIX KENTA SHIGAKI [PHENIX Collaboration]

More information

Jet Energy Loss at RHIC

Jet Energy Loss at RHIC QCD Session Jet Energy Loss at RHIC Nathan Grau Columbia University for the PHENIX Collaboration Fundamental Question in QED An early study in QED: charged particles losing energy in matter Bethe Formula

More information

arxiv:nucl-ex/ v1 13 Dec 2005

arxiv:nucl-ex/ v1 13 Dec 2005 The Ratio Σ /Λ at RHIC arxiv:nucl-ex/58v 3 Dec 5 G. Van Buren for the STAR Collaboration Dept. of Physics, Brookhaven National Laboratory, Upton, NY 973-5 USA E-mail: gene@bnl.gov Abstract While yields

More information

PoS(CFRNC2006)014. Fluctuation studies in STAR. Supriya Das (for the STAR Collaboration)

PoS(CFRNC2006)014. Fluctuation studies in STAR. Supriya Das (for the STAR Collaboration) Variable Energy Cyclotron Centre /AF, Bidhannagar, Kolkata 76 India. E-mail: S.Das@gsi.de Study of event by event fluctuations of thermodynamic quantities offer us more insight about the hot and dense

More information

Nuclear modification factor for charged pions and protons at forward rapidity in central Au + Au collisions at 200 GeV

Nuclear modification factor for charged pions and protons at forward rapidity in central Au + Au collisions at 200 GeV Physics Letters B 650 (2007) 219 223 www.elsevier.com/locate/physletb Nuclear modification factor for charged pions and protons at forward rapidity in central Au + Au collisions at 200 GeV BRAHMS Collaboration

More information

Global variables and identified hadrons in the PHENIX experiment

Global variables and identified hadrons in the PHENIX experiment PRAMANA cfl Indian Academy of Sciences Vol. 60, No. 5 journal of May 003 physics pp. 953 963 in the PHENIX experiment JOHN P SULLIVAN, for the PHENIX Collaboration P-5 MS-H846, Los Alamos National Laboratory,

More information

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland Available on the CMS information server CMS CR 212/178 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH211 GENEVA 23, Switzerland 212//9 Measurement of isolated photon

More information

Jet Results in pp and Pb-Pb Collisions at ALICE

Jet Results in pp and Pb-Pb Collisions at ALICE Jet Results in pp and Pb-Pb Collisions at ALICE Oliver Busch for the ALICE Collaboration Motivation Jet reconstruction in ALICE Jets in pp Jets in Pb-Pb Hadron triggered recoil jets Motivation Jets originate

More information

Space-time Evolution of A+A collision

Space-time Evolution of A+A collision Time Space-time Evolution of A+A collision Jets Fluctuations p p K K0* f g e m Hadronization (Freeze-out) + Expansion Mixed phase? QGP phase Thermalization Space (z) A Pre-equilibrium A Hadrons reflect

More information

Recent Results of NA49

Recent Results of NA49 Recent Results of NA49 M. Gaździcki for the NA49 Collaboration Institut für Kernphysik, Univetsität Frankfurt D 6486 Frankfurt, Germany Abstract Results on the energy dependence of pion and strangeness

More information

Jet Physics at ALICE. Oliver Busch. University of Tsukuba Heidelberg University

Jet Physics at ALICE. Oliver Busch. University of Tsukuba Heidelberg University Jet Physics at ALICE Oliver Busch University of Tsukuba Heidelberg University 1 2 Outline Introduction Results from pp collisions Identified jet fragmentation in pp Jets in heavy-ion collisions Jet shapes

More information

Measurement of D-meson production in p-pb collisions with the ALICE detector

Measurement of D-meson production in p-pb collisions with the ALICE detector Journal of Physics: Conference Series OPEN ACCESS Measurement of D-meson production in p-pb collisions with the ALICE detector Related content - he ALICE Collaboration - he ALICE Collaboration - he ALICE

More information

Identified charged hadron production in pp, p Pb and Pb Pb collisions at LHC energies with ALICE

Identified charged hadron production in pp, p Pb and Pb Pb collisions at LHC energies with ALICE EPJ Web of Conferences 95, 04075 (2015) DOI: 10.1051/ epjconf/ 20159504075 C Owned by the authors, published by EDP Sciences, 2015 Identified charged hadron production in pp, p Pb and Pb Pb collisions

More information

Open heavy-flavour production in pp, p Pb and Pb Pb collisions in ALICE

Open heavy-flavour production in pp, p Pb and Pb Pb collisions in ALICE Open heavy-flavour production in pp, p Pb and Pb Pb collisions in ALICE (INFN, Bologna) on behalf of the ALICE Collaboration Bormio Winter Meeting 26/01/2018 Why open heavy flavour in ALICE? Heavy-flavour

More information

The first Z boson measurement in the dimuon channel in PbPb collisions at s = 2.76 TeV at CMS

The first Z boson measurement in the dimuon channel in PbPb collisions at s = 2.76 TeV at CMS The first Z boson measurement in the dimuon channel in PbPb collisions at s = 2.76 TeV at CMS Lamia Benhabib On behalf of CMS collaboration We present the first measurement of Z bosons in the di-muon channel

More information

STAR heavy-ion highlights

STAR heavy-ion highlights STAR heavy-ion highlights Olga Rusnakova (for the STAR Collaboration) 1,a 1 Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, Praha 1 Abstract. Parton

More information

Multiple Parton-Parton Interactions: from pp to A-A

Multiple Parton-Parton Interactions: from pp to A-A Multiple Parton-Parton Interactions: from pp to A-A Andreas Morsch CERN QCD Challenges at LHC Taxco, Mexico, Jan 18-22 (2016) Multiple Parton-Parton Interactions Phys. Lett. B 167 (1986) 476 Q i 2 Λ QCD

More information

First Run-2 results from ALICE

First Run-2 results from ALICE First Run-2 results from ALICE Goethe University Frankfurt & GSI on behalf of the ALICE Collaboration XLV International Symposium on Multiparticle Dynamics Wildbad Kreuth, 4-9 Oct 2015 1 Outline Introduction

More information

Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-pb collisions at 5.

Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-pb collisions at 5. [1] Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p-pb collisions at 5.02 ATeV Gyula Bencedi (Wigner RCP, Hungary) on behalf of the ALICE Collaboration

More information

Searches for Chiral Effects and Prospects for Isobaric Collisions at STAR/RHIC

Searches for Chiral Effects and Prospects for Isobaric Collisions at STAR/RHIC Searches for Chiral Effects and Prospects for Isobaric Collisions at STAR/RHIC (for the STAR Collaboration) University of California, Los Angeles E-mail: lwen@physics.ucla.edu Searches for the chiral effects

More information

MEASUREMENTS OF HIGH DENSITY MATTER AT RHIC

MEASUREMENTS OF HIGH DENSITY MATTER AT RHIC MEASUREMENTS OF HIGH DENSITY MATTER AT RHIC Peter Jacobs Lawrence Berkeley National Laboratory, Berkeley, CA 9472 ABSTRACT QCD predicts a phase transition between hadronic matter and a Quark Gluon Plasma

More information

Mapping the Nuclear Matter Phase Diagram with STAR: Au+Al at 2.8 AGeV and Au+Au at 19.6 GeV

Mapping the Nuclear Matter Phase Diagram with STAR: Au+Al at 2.8 AGeV and Au+Au at 19.6 GeV Mapping the Nuclear Matter Phase Diagram with STAR: Au+Al at 2.8 AGeV and Au+Au at 19.6 GeV Samantha G Brovko June 14, 2011 1 INTRODUCTION In ultra-relativistic heavy ion collisions a partonic state of

More information

Quarkonia physics in Heavy Ion Collisions. Hugo Pereira Da Costa CEA/IRFU Rencontres LHC France Friday, April

Quarkonia physics in Heavy Ion Collisions. Hugo Pereira Da Costa CEA/IRFU Rencontres LHC France Friday, April Quarkonia physics in Heavy Ion Collisions Hugo Pereira Da Costa CEA/IRFU Rencontres LHC France Friday, April 5 2013 1 2 Contents Introduction (QGP, Heavy Ion Collisions, Quarkonia) Quarkonia at the SPS

More information

Measurement of W-boson production in p-pb collisions at the LHC with ALICE

Measurement of W-boson production in p-pb collisions at the LHC with ALICE Measurement of W-boson production in p-pb collisions at the LHC with ALICE for the ALICE Collaboration University of Cape Town Rondebosch, Cape Town, 7700, South Africa ithemba Laboratory of Accelerator

More information

PoS(Confinement8)110. Latest Results on High-p t Data and Baryon Production from NA49

PoS(Confinement8)110. Latest Results on High-p t Data and Baryon Production from NA49 Latest Results on High-p t Data and Baryon Production from NA49 for the NA49 Collaboration Institut für Kernphysik, J.W. Goethe Universität, Frankfurt am Main, Germany E-mail: blume@ikf.uni-frankfurt.de

More information

First results with heavy-ion collisions at the LHC with ALICE

First results with heavy-ion collisions at the LHC with ALICE First results with heavy-ion collisions at the LHC with ALICE Domenico Elia INFN, Bari (Italy) on behalf of the ALICE Collaboration D. Elia (INFN Bari, Italy) PANIC 011 / Boston, MA (USA) July 4-9, 011

More information

arxiv:nucl-th/ v2 8 Jun 2006

arxiv:nucl-th/ v2 8 Jun 2006 Acta Phys. Hung. A / (2005) 000 000 HEAVY ION PHYSICS Strange quark collectivity of φ meson at RHIC arxiv:nucl-th/0510095v2 8 Jun 2006 J. H. Chen 1,2, Y. G. Ma 1,a, G. L. Ma 1,2, H. Z. Huang 1,3, X. Z.

More information

arxiv: v2 [nucl-ex] 3 Jun 2008

arxiv: v2 [nucl-ex] 3 Jun 2008 arxiv:86.4v [nucl-ex] 3 Jun 8 WHERE FEYNMAN, FIELD AND FOX FAILED AND HOW WE FIXED I A RHIC M.J. ANNENBAUM Physics Department, 5c, Brookhaven National Laboratory Upton, NY 973-5, U.S.A. Hard-scattering

More information

Elliptic flow. p y. Non-central collision of spherical nuclei or central collision of deformed nuclei. Overlapping zone is of almond shape

Elliptic flow. p y. Non-central collision of spherical nuclei or central collision of deformed nuclei. Overlapping zone is of almond shape Outline: Non-central collision of spherical nuclei or central collision of deformed nuclei Overlapping zone is of almond shape Co ordinate space anisotropy is converted into momentum space anisotropy via

More information

Ultra-Relativistic Heavy Ion Collision Results

Ultra-Relativistic Heavy Ion Collision Results Ultra-Relativistic Heavy Ion Collision Results I. Overview of Effects Observed in Large Nucleus-Nucleus Collision Systems (Au+Au, Pb+Pb) High p T Hadrons Are Suppressed at LHC & RHIC Central Pb-Pb and

More information

Assessment of triangular flow in jet background fluctuations for Au+Au collisions First look at dijet imbalance (A J )

Assessment of triangular flow in jet background fluctuations for Au+Au collisions First look at dijet imbalance (A J ) Assessment of triangular flow in jet background fluctuations for Au+Au collisions First look at dijet imbalance (A J ) Wayne State REU 2012 Research Advisor: Joern Putschke Research Undergraduate: Joshua

More information

Quark Gluon Plasma Recent Advances

Quark Gluon Plasma Recent Advances Quark Gluon Plasma Recent Advances Lawrence Berkeley National Laboratory LP01, Rome, July 2001 Introduction P.C. Sereno et al. Science, Nov. 13, 1298(1998). (Spinosaurid) We may not see the entire body

More information

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland

Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland CMS CR CMS Quarkonia Measurements he Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH- GENEVA 3, Switzerland /8/6 arxiv:8.577v [hep-ex] 5 Aug Quarkonia Measurements by the

More information

Measurement of photon production cross sections also in association with jets with the ATLAS detector

Measurement of photon production cross sections also in association with jets with the ATLAS detector Nuclear and Particle Physics Proceedings 00 (07) 6 Nuclear and Particle Physics Proceedings Measurement of photon production cross sections also in association with jets with the detector Sebastien Prince

More information

Hints of incomplete thermalization in RHIC data

Hints of incomplete thermalization in RHIC data Hints of incomplete thermalization in RHIC data Nicolas BORGHINI CERN in collaboration with R.S. BHALERAO Mumbai J.-P. BLAIZOT ECT J.-Y. OLLITRAULT Saclay N. BORGHINI p.1/30 RHIC Au Au results: the fashionable

More information